Across
- 5. lower chamber of heart
- 6. enter our body.
- 7. carry blood from the heart to all parts of the body
- 10. which fight against germs that
- 11. carry blood from all parts of the body back to the heart
Down
- 1. pigment in RBC
- 2. chambers in human heart
- 3. a muscular pump
- 4. gas that is required for cellular respiration
- 7. upper chamber of heart
- 8. walls of artery
- 9. stops the backflow of blood